This message means you've created as many documents as your current plan allows.
Your limit resets at the start of each billing period - a month or a year from the date you bought your subscription, not on the 1st of the month or in January.
What you can do
Upgrade to a higher plan and keep creating documents straight away. Premium has no limit at all. See how to upgrade
Wait for your next billing period, when your limit resets
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